51123235423 has 32 divisors (see below), whose sum is σ = 57511157760. Its totient is φ = 45119894400.

The previous prime is 51123235367. The next prime is 51123235439. The reversal of 51123235423 is 32453232115.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51123235423 is a prime.

It is a super-2 number, since 2×51123235423² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123235463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20890986 + ... + 20893432.

It is an arithmetic number, because the mean of its divisors is an integer number (1797223680).

Almost surely, 2^51123235423 is an apocalyptic number.

51123235423 is a deficient number, since it is larger than the sum of its proper divisors (6387922337).

51123235423 is a wasteful number, since it uses less digits than its factorization.

51123235423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 21600, while the sum is 31.

Adding to 51123235423 its reverse (32453232115), we get a palindrome (83576467538).

The spelling of 51123235423 in words is "fifty-one billion, one hundred twenty-three million, two hundred thirty-five thousand, four hundred twenty-three".